Padlock



' J. KEBOLA Dec. 15, 1931.

PADLOCK Filed May '7, 1928 ,m .3 0 Z I kaorw iii: 3 o M w W 7 1 7 w na ans 5 27a 5 es I wfi H l l I z 4 9 m w m. 6. xi w m .z w 3 mm 7 MW 5 w .w M w x 2 3 6 /w w z 6 3 J 4fl9 w m 6 Patented Dec. 15, 1931 UNITED STATES PATENT OFFICE PADLOCK Application filed May 7,

This invention relates to padlocks of the type wherein shackle controlling elements are spring actuated to secure the shackle and key actuated to release the shackle.

s Primarily the object of the invention is the provision in a padlock structure of a plurality of lockingparts engageable by a one-piece key and operable in sequence to release a shackle. A further object of the invention is the provision of shackle engaging and associated elements of such form and arrangement that slight change in certain of the parts will provide for variation in key form re- 7 quired for numerous available combinations and that all of the parts may be simplyassembled in operative relation entirely within tubular bores in a solid housing or casing.

In the accompanying drawings I have shown in detail one convenient form of embodiment of the invention which to enable those skilled in the art to practice the same will be set forth fully in the following description while the novelty of the invention will be defined in the appended claims.

In the drawings, 1

Figure 1 is a sectional view of a padlock housing or casing showing shackle control mechanism embodying my invention,.the shackle is shown in closed or locked position.

Figure 2 is a view similar to Fig. 1, with the shackle shown in released or open position.

Figure 3 is a sectional view on line 33 of Fig. 1, looking in the direction of the arrow.

Figure 4 is a view similar to Fig. 3,showing a different kind of key for engaging shackle control mechanism.

Figure 5 is a detail view of shackle control mechanism in correlation established by 40 manipulation of the form of key shown in Fig. 4.

Figure 6 is a plan view'of shackle controlling elements in the same correlation as that in which they are shown in Fig. 1,

45 and,

Figure 7 is a plan view of shackle controlling elements in the same correlation as that in which they are shown in Fig. 2.

Referring to the drawings it will be observed that the entire padlock mechanism 1928. Serial No. 275,700.

embodying my invention, that is to say the shackle, shackle controlling elements and as sociated parts, are all of a character to be best accommodated or housed in tubular bores. The padlock casing 1, therefore is preferably made from solid bar stock of suitable cross section. This stock when out into blanks of required length may be provided with the tubular bores by a simple drilling operation for which all of the holes may be located by a single jig for holdingthe blank.

In accordance with common practice the shackle 2, may be bent into substantially U-form with a short leg 3, and a long leg 4. With the shackle in closed position (see Fig. 1) the short leg 3, enters bore 5, which need extend into the casing but a short distance to accommodate said leg. The long leg 4, extending into bore 6 is backed by a spring 7 The usual longitudinal movement of the shackle is required and also the rotary or swinging movement thereof as when the short leg is disengaged from bore 5, and swung clear of the casing in either lateral direction. Provision for such movement may be made asfollows. The leg 4, is channeled to form a flat face 8, terminating in the concave shoulder 9, and the square shoulder 10. Both the flat face 8 and the shoulder 10 are adapted to be engaged by a pin 11, extending transversely across bore 6. Normally the shackle is moved outwardly, that is to its open position, by spring 7, until shoulder 10, engages pin .11,-when the shackle is forced inwardly to closed or locked position, shoulder 9, is adjacent pin 11. R0- tary or swinging movement of the shackle when in its outer position (that in which it is shown in Fig. 2) is permitted by virtue of a half round groove 12, formed in shackle leg. 4, and located to register with pin 11, when the latter is engaged by stop shoulder. 10.

An element for locking shackle 2, in its closed position comprises a bolt 14, located in the bore 15, disposed at right angles to and intersecting bore 6. This bolt is provided with a slight-1y enlarged head 16, accommodated in counterbore 17, of bore '15, and the head is backed by a bolt actuating spring 18, which is retained in the counter- A inward movement of the shackle is prevented by contact of the end of leg 3 with the bottom of bore 5.

For the purpose of introducing into the mechanism of my improved padlock. means whereby said mechanism is rendered proof against shackle releasing actuation except through the agency of an exactly formed and peculiarly actuated key, I provide a locking bolt detent 20, which will now be described. Such a detent may be housed in a bore 21, extended longitudinally through the casing and intersecting at substantially right angles the bore 15, provided for locking bolt 14. Said bore also accommodates in a slightly enlarged portion thereof 22, a key as 23, which may be inserted into said bore through a slotted washer 24, rotatable in a counterbore 25, and held in said counterbore by peening inwardly metal at the edge of the latter, as at 26.

Referring again to detent 20, it may as shown, comprise a pin with a cylindrical head 27, and a half cylindrical shank 28, provided with a lateral notch 29. The locking bolt is formed to mate the detent, that is, it is flatted at 30, to engage the shoulder 31, formed at the juncture of the shank and head of the detent,it is channeled at 32, to receive the shank of the detent,and it is provided with a tongue 33, to engage the notch 29, in the detent. The round or cylindrical head of the detent is fitted for longitudinal move ment in bore 21. Normally, or in the correlation of parts shown in Fig. 1, a spring 34,

tends to hold the detent 20, against the locking bolt 14, that is with shoulder 31, against fiat 30. The spring is backed by a plug 35, closely fitted to permanently close the end of bore 21. From the foregoing it will be clear that the detent in its normal position is effective to prevent lateral or shackle releasing movement of bolt 14, due to the fact that the shank of the detent lies in the channelextending transversely of said bolt. As before intimated the normal or locked relation of pressure of spring 7.

end of the key engages the end of detent 20. The key is then further advanced to move the detent against the pressure of its spring until the end 38, of the key engages the body of the bolt. The extent of this latter movement places the detent so that the notch 29, in the detent shank re isters with tongue 33, of the looking bolt. .n this position of the key, notches as 39, in the side of the key are adapted to register with projections of a Ward pin, as 40, fitted in bore 41, of the padlock casing. Now, by virtue of registration of the described mating parts, the key may be turned upon its axis, and as the offset end of the key is contiguous to the head of the bolt, such movement of the key withdraws the bolt from the notch in the shackle and thereby frees the latter. (See Fig. 2.) 7

It will be observed that the key referred to in the preceding description is not of the same configuration on both sides and that conseqnently special care is re uired to insert the key properly in the lock, t at is to say right side up. In Figs. 4 and 5, there is shown a key 42, formed exactly alike on opposite sides so that it may be inserted in its lock either Way round. In this case the extreme end 43, of the key is located between shoulders 44, on opposite sides thereof. For this style of ke ,the shank of detent 20, may be beveled or re ieved as at 45, so that it will always be engaged only by either of key shoulders 44. For either style of key the ward pin 40, may be varied in form for difierent locks, or additional ward pins may be provided. Irrespective, however, of the combination pin or pins many combinations are available through slight change in dimensions of certain coacting parts. The length of the detent shank,

the position of the tongue receiving notch in said shank, and the length of the end of the key beyond the detent shank engaging shoulder, determine the alignment of parts required to permit release of the locking bolt. By changing these various dimensions numerous combinations are available so that a different form of key may be made for each one of a large number of locks.

Having thus described my invention, what I claim is,

1. A padlock including a casing having transversely disposed intersecting bores, a shackle, a shackle locking bolt disposed for longitudinal movement in one of the bores, and a detent for the bolt disposed for longitudinal movement in the other bore, the bolt and detent each having a head and body portion, the body portion of the bolt being formed to provide a tongue opposed to the head and adapted to receive between said head and tongue the body portion or shank of the detent, and said shank having a notch therein wherebymovement of the detent to register said notch with the tongue of the bolt will permit movement of the bolt to release the shackle.

2. A padlock including a casing having transversely disposed intersecting bores, a shackle, a shackle locking bolt disposed for longitudinal movement in one of the bores, and a detent for the bolt disposed for longitudinal movement in the other bore, one of said elements being formed with a tongue and head which are opposed to each other and adapted to receive therebetween the body of V the other element, the latter having a notch therein whereby movement of the detent to register said notch and tongue will permit movement of the bolt to release the shackle.

In testimony whereof I affix my signature.

JOSEPH KEBOLA. 

